X     water-heater



H. J. HUGHES.

WATER HEATER.

APPLiCATION FILED )AN.19. m7

Patented May 27, 1919.

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HENRYJ. HUGHES, 0F OTTAWA, ILLINOIS.

LATER-HEATER.

To all whom it may concern: 7 Be it known that I, HENRY J. Hue-Hus, citizen of the United States, and a resident of Ottawa, in the county of La Salle and State of Illinois, have invented certain new and useful Improvements in Water-Heaters, of which the followin is a specification.

My invention is an improvement in water heaters, and has for its object to provide" means for use in connection with the usual house boiler for heating the waterwithin the same by conduction instead of directly, to prevent the deposit of sediment in the water back or the gas heater.

Inthe drawings:

Figure 1 is a front view of a house boiler provided with the improvement,

Fig. 2 is an enlarged partial vertical section, and

Fig. 3 is a section on the line 3-3 of Fig. 2.

The present embodiment 'ofthe inventlon is shown in connection with a house boiler 1 of the usual type, having in connection there with a gas heater 2, the said gas heater being connected to the boiler by pipes 3 and 4. The boiler is also provided with a water 1nlet pipe 5 and with an outlet pipe 6. The improvement comprises an auxlliary boiler in the form of a casing 8, which is seated over the lower end of the boiler 1, the lower end of the said boiler 1 being within the auxiliary boiler. The auxiliary boiler is of greater diameter than the main boiler, so that an annular chamber is formed between the two and the bottom 9 of the main boiler is spaced above the bottom 10 of the auxiliary boiler by means of the feet 11 shown more particularly in Fig. 2. These feet are in the present instance, four in number, and are metal straps bent into 100p form and having their ends clamped to the boiler by rivets 12*, which are passed through the ends of the loop below the edge of the main boiler.

The pipe 4: before mentioned, passes through a nipple 12 in the bottom of the auxiliary tank, and a packing 13 is arranged. about the pipe between the end of the nipple and a packing nut 14; which is threaded onto the nipple, the packing making a water tight joint at this point. At its upper end the auxiliary boiler 8 is drawn in, as indicated at 15, to a connection with a collar 16, which encircles the boiler 1, making a tight connec- Specification of Letters Patent. P t t may??? 19 9,

Application filed January 19, 1917. Serial No. 143,251.

tion at this point, The drawn in portion 15 has a door opening which is normally closed by adoor 17 By meansof this door opening, the auxiliary tank may be filled, and the said tank is supplied with connections 18 and 19, to a water-back in the furnace means ofwhich the water in the the auxiliary tank 8 is heated.-

In comp'arison, the temperature of the,

heat from the gas heater 2.,is low when compared witli the temperature of the furnace water-back. V A fact that has developed to be a matter of common knowledge in connection with heating apparatus of this type a. is, that where the city water, especially if it contains such substances as lime in solution, deposits out of such substances accumulate in the pipe connections when the water is subjected to extremely high temperatures as it is when it passes through a furnace waterback. Difficulty is therefore experienced with such arrangement when it is attempted to heat the water in the boiler by means of the gas heater in the summer time when the fire in the furnac is out.

The result is that there can be little or no circulation of water through the boiler from the gas heater, and consequently the apparatus must be taken out and the pipe connection cleaned. The present invention overcomes all present difliculties in this respect by simply separating the high temperature heat source and the low temperature heat source from direct communication with each other and with the boiler. This is done by interposing the auxiliary boiler 8 with its distilled or rain water. The furnace waterback W now having no direct connection to the main boiler and furthermore serving to heat water that contains no lime, obviously can no longer be th instrument by which the pipe connections are clogged, and consequently those heat sources operate to heat the water in the boiler 1 without interference from the diiiiculty mentioned.

In operation, the auxiliary tank is filled with rain water or other water that is not hard, while the ordinary city water is used in the house boiler. The water from the auxiliary boiler flows through the water back where it is heated, returning to the auxiliary boiler, and in turn heating the water in the main boiler. As is known, where hard water is used in a house boiler connected with the water back or other heater, the Water back and connecting-pipes soon become choked by the sediment deposited by the hard Water. In the present a rrangement the hard Water does not enter the Water back nor the pipes leading thereto,

peratureheat source includinga gas heater in fluid connection With said boiler, the-heat from said heater being insufficiently great to cause the precipitation oi: lime in the main boiler fluid connections, and air'auxil iary boiler holding rain Water, receivingtheloWer portion of the main boiler, having a comparatively high-temperature heat-source including a furnace Water-back in fluid connection With said boiler, th indirect heating" of the lime-filled Water in the main'boiler through the auxiliary boiler also avoiding" the precipitation vof lime by the action of the comparatively high-temperature heat.

2. Instrumentalities in combination enabling the heating of Water from either a comparatively high-temperature heat source ing the precipitation of sedimentin the pipe connections of the hightemperature heat source, comprising in combination a main boiler holding city Water in fluid connection with a gas heater, and an auxiliary boiler holding filtered water, receiving the lower portion of the main boiler and in fluid connection With a furnace Water-back, the comparatively high-temperature heat source of the Water-back being out' of' communication with the main boiler, thus avoiding the clogging of the gas'heater pipe connections.

HENRY J. HUGHES.

WVitnesses z' E WARD'J. CURTIS, NORA FJHUGHES.

Copies of this patent may he obtained for five cents each, by addressing the Commissioner of Patents, 7

Washington, D. C.

-or a loWtempe rature heat source, by avoid- 

